They built their city upon a cliff overlooking the sea.他们将城市建在濒海的悬崖上。The city was walled and built upon a rock.这座城市建在岩石上,四周筑有城墙。It's surrounded on three sides by council housing estates.它三面都被市建住宅区围住。The city was built near a large body of water.这个城市建在一大片水域的旁边。